TY - JOUR
T1 - High-Performance Lead-Free Solar Cells Based on Tin-Halide Perovskite Thin Films Functionalized by a Divalent Organic Cation
AU - Chen, Min
AU - Dong, Qingshun
AU - Eickemeyer, Felix T.
AU - Liu, Yuhang
AU - Dai, Zhenghong
AU - Carl, Alexander D.
AU - Bahrami, Behzad
AU - Chowdhury, Ashraful H.
AU - Grimm, Ronald L.
AU - Shi, Yantao
AU - Qiao, Qiquan
AU - Zakeeruddin, Shaik Mohammed
AU - Grätzel, Michael
AU - Padture, Nitin P.
N1 - Funding Information:
The authors thank M. Hu, W. Tress, Y. Zhang, and Y. Zhou for experimental assistance. The work at Brown University was supported by NSF (grant no. 1538893) and ONR (grant nos. N00014-17-1-2232 and N00014-20-1-2574). The work at South Dakota State University (SDSU) was support by NSF (grant no.1428992) and US-Egypt Science and Technology Joint Fund. The work at SDSU is derived from the Subject Data supported in whole or part by NAS and USAID. Q.D. and Y.S. acknowledge the support from the National Natural Science Foundation of China (grant no. 51773025) and China Postdoctoral Science Foundation (grant no. 2019TQ0046). The work at EPFL was supported by the Swiss National Science Foundation (Ambizione Energy grant no. 173617), and M.G. thanks the financial support from the GRAPHENE Flagship Core 2 project supported by the European Commission H2020 Programme under contract number 785219.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/7/10
Y1 - 2020/7/10
N2 - Tin-based halide perovskite solar cells (PSCs) hold the most promise among lead-free PSCs, but they are plagued with inadequate environmental stability and power-conversion efficiency (PCE). Here we demonstrate that the optimum incorporation of a bulky divalent organic cation, 4-(aminomethyl)piperidinium (4AMP), in FASnI3 thin films improves stability, optoelectronic properties, and PSC performance. The optimized PSC yields a maximum PCE of 10.9% and good 500-h operational stability under continuous illumination. This is attributed to the unique thin-film structure, where the strong ionic bonding afforded by divalent 4AMP may provide near-full-coverage functionalization (encapsulation) of FASnI3 grain surfaces and grain boundaries, retarding O2/H2O ingression and mitigating Sn-defects for reduced photocarrier nonradiative recombination.
AB - Tin-based halide perovskite solar cells (PSCs) hold the most promise among lead-free PSCs, but they are plagued with inadequate environmental stability and power-conversion efficiency (PCE). Here we demonstrate that the optimum incorporation of a bulky divalent organic cation, 4-(aminomethyl)piperidinium (4AMP), in FASnI3 thin films improves stability, optoelectronic properties, and PSC performance. The optimized PSC yields a maximum PCE of 10.9% and good 500-h operational stability under continuous illumination. This is attributed to the unique thin-film structure, where the strong ionic bonding afforded by divalent 4AMP may provide near-full-coverage functionalization (encapsulation) of FASnI3 grain surfaces and grain boundaries, retarding O2/H2O ingression and mitigating Sn-defects for reduced photocarrier nonradiative recombination.
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U2 - 10.1021/acsenergylett.0c00888
DO - 10.1021/acsenergylett.0c00888
M3 - Article
AN - SCOPUS:85089532868
SN - 2380-8195
VL - 5
SP - 2223
EP - 2230
JO - ACS Energy Letters
JF - ACS Energy Letters
IS - 7
ER -